This excel sheet contains formulas for calculating cable tray size and conduit size.
Cable tray width calculation.
Minimum allowable tray.
The total sum of the cross sectional areas of all the cables to be installed in the cable tray must be equal to or less than the allowable cable area for the.
B cables smaller than 4 0 awg kcmill 120 sq mm ladder type cable tray.
Cable tray size includes tray width tray length tray weight and tray area.
Distance between each cable is 10mm.
Cable id cable o d.
Cables of 0 21.
This is typically in a raceway cable tray or conduit in a cable burried in the earth or in open air.
Distance enter the one way length of the wires in the circuit in feet.
To determine the required width of a ladder or ventilated trough cable tray as per section 318 11 b 4.
Solid bottom cable tray.
Voltage drop choose the maximum percentage of the source voltage drop.
Cable tray should be perforated and 20 spare capacity.
It is recommended not to exceed a voltage drop of 5.
1 2 no s of 3 5cx300 sq mm xlpe cable having 59 7mm outer diameter and 5 9 kg meter weight 2 2 no s of 3 5cx400 sq mm.
Total cable tray width required is 8 56 inches 6 90 inches 15 46.
9 to begin a new calculation return to the input screen and select the clear button.
On tue dec 2 2014 at 7 52 pm electrical notes articles wrote.
Cable are laying in single layer in cable tray.
Chart is based on 50 fill of 4 utp category 6 cable o d 21 033lbs ft not maximum loading weight for the tray.
Calculate cable tray width calculate cable tray area calculate cable tray length calculate cable tray weight calculate remaining width of cable tray calculate remaining area of cable tray free download.
Lbs ft inside tray depth.
This will clear both the input and output pages.
All the calculations are subjected to the requirements of the national electrical code nec.
Not required outside diameter cable qty cable size weight lbs ft total cable weight.
Tray size of 0 1852 o d.
Total width of the cables 8 x 1 07 inches 8 56 inches.
Practical guide on the amount of cable weight that can be installed tested in accordance with nema ve 1 csa e222 2 126 1.
2 fill in all pertinent project information.
Space between cables must be equal to 2 15 times one cable diameter 3 x 2 15 x 1 07 inches 6 90 inches.
Wire basket cable tray fill calculator cable tray sizing calculator.
A 50 fill ratio should equal the maximum number of cables pulled in a given cross section.
Cable tray is sized based on the number and type of cables required for the current and future need.
The cable tray sizing equals the width times the loading depth.
Generally cable tray sizing is correct when it appears 50 full of cable or wire or when it contains a 50 fill of cables or wire.
